JP3831736B2 - Air refrigerant cooling system using an air refrigerant cooling device and an air refrigerant cooling device - Google Patents

Description

  The present invention relates to an air refrigerant cooling device having a motor internal air cooling mechanism and an air refrigerant cooling system using the air refrigerant cooling device having a motor internal air cooling mechanism.

  The air-refrigerant cooling / heating system includes an air-refrigerant cooling device, a heat exchanger, a refrigerator, and the like, and is intended to maintain a refrigerated product stored in the refrigerator at a low temperature.

  In a refrigeration apparatus used in a conventional cooling system, the stator portion of the motor is water-cooled (oil-cooled) in order to cool the drive motor. Alternatively, as can be seen in the air cooling motor 1 shown in FIG. 1, the external fin 5 is connected to the outside of the stator casing 6, and the entire air cooling motor 1 is constituted by the air cooling fan 2 attached to the main shaft 7 via the external fin 5. It was air-cooled.

  In the conventional air-cooled motor 1, in the stator that is a main heat generating portion, the heat generation ratio from the stator coil main body 4 is high in the stator coil main body 4 and the stator coil end portion 3 that are constituent elements of the stator. For this reason, cooling of the whole motor was achieved only by connecting the stator coil body 4 to the stator casing 6 and cooling the external fins 5 connected to the outside of the stator casing 6 by the air cooling fan 2.

  However, in recent years, there has been a demand for higher efficiency of air-refrigerant cooling / heating systems and storage of products at lower temperatures. For this purpose, it is necessary to improve the efficiency and reliability of the air refrigerant cooling device in addition to improving the performance.

  In order to improve the efficiency of the air-refrigerant cooling system, it is conceivable to increase the rotation speed of the motor. However, in order to maintain the high-speed rotation, the exhaust heat efficiency inside the motor is increased to improve the reliability, It is necessary to improve the reliability of the support mechanism for the main shaft that is the drive unit.

  However, when the motor is rotated at a high speed and the motor is controlled using a general-purpose inverter board, it is necessary to reduce the number of poles of the motor and lower the inverter frequency. When the number of poles of the motor is reduced, the ratio of the length of the stator coil end portion to the length of the stator body is increased on the structure of the motor. When the ratio of the lengths of the stator coil end portions increases, the amount of heat generated from the stator coil end portions increases when the motor is driven, and the conventional motor cooling method results in insufficient cooling of the entire motor.

  The following proposals have been made in relation to the technology as just described.

  In the “air-cooled motor” disclosed in Japanese Patent Application Laid-Open No. 2003-158839, a plurality of cooling holes provided along the axial direction of a stator core made of a laminated iron core, and a laminated iron core provided via a stator core and a magnetic gap are provided. A motor shaft having a rotor core fixed to the outer periphery, a load-side bracket that projects the tip of the motor shaft to support the tip of the stator core, and a reaction that supports the rear end of the stator core by projecting the rear end of the motor shaft A load-side bracket, a housing provided on the outer periphery of the anti-load-side bracket via a space to seal the rear end portion of the stator core, and a fan unit provided with a forced air cooling fan at the rear of the housing. In an air cooling motor in which cooling air is made to flow toward the space surrounded by the housing and the non-load side bracket, the load side bracket and The load side bracket has a plurality of cooling holes and a guide provided so as to cover the coils provided in the stator core while guiding the cooling air taken from the cooling holes of the load side bracket to the motor shaft. There has been proposed an air-cooled motor in which a plurality of through holes are provided in the motor shaft so that cooling air taken from the cooling holes of the load side bracket can flow toward the cooling holes of the anti-load side bracket.

  Further, in relation to an air refrigerant cooling system using an air refrigerant refrigeration apparatus, an “air refrigerant refrigeration apparatus” disclosed in Japanese Patent Application Laid-Open No. 11-132582 has a compressor, air cooling in the air path. A heat exchanger, an air-to-air heat exchanger, and an expander are arranged in the order of air flow, the air in the cooling room is taken into the compressor via the air-to-air heat exchanger, and the air that has left the expander In the air refrigerant refrigeration apparatus blown out into the cooling room, a valve interposition for returning a part or all of the air exiting the expander to the air-to-air heat exchanger bypassing the cooling room A first bypass passage and a valve for taking air of 0 ° C. or more from the air passage before leaving the compressor and entering the expander, and supplying it to the inlet air passage of the air-to-air heat exchanger An air refrigerant refrigeration system with a hot air bypass path is proposed. To have.

JP 2003-158839 A JP-A-11-132582

  An object of the present invention is to provide an air refrigerant type cooling device including a motor internal air cooling mechanism that is highly reliable and efficient. Another object of the present invention is to provide an air refrigerant cooling / heating system having a simplified configuration using the air refrigerant cooling device.

  Hereinafter, means for solving the problems will be described using the numbers and symbols used in [Best Mode for Carrying Out the Invention] in parentheses. These numbers and symbols are added to clarify the correspondence between the description of [Claims] and the description of [Best Mode for Carrying Out the Invention]. It should not be used to interpret the technical scope of the invention described in “

  The air refrigerant cooling device of the present invention includes a motor casing (321), a main shaft (324) inserted into the motor casing, and a stator coil (325, 327) that is housed in the motor casing and rotationally drives the main shaft. ), And a heat dissipating means for dissipating heat stored in the motor casing and accumulated in the stator coil, and a compressor (310) connected in the first axial direction of the motor An expansion turbine (330) connected in a second axial direction of the motor, and the stator coil is a stator coil body (325) and a stator coil end portion that is positioned symmetrically in the axial direction with the stator coil body interposed therebetween (327), and the heat dissipating means is disposed between the stator coil body (325) and the motor casing (321). Due to external pressure from the outside, the heat dissipating means and the stator coil end portion (327) are arranged through the first intake hole (321a) and the second intake hole (321b) provided in the motor casing (321). A pressure difference is created between the space that is present and the outside of the motor (320).

  Further, the air refrigerant type cooling device of the present invention is further arranged between the space where the heat dissipating means and the stator coil end portion, which are arranged in the motor casing and are generated by the external pressure from the outside of the motor, and the outside of the motor. A guide plate (460) for controlling the air flow direction is provided.

  Further, the heat dissipating means related to the air refrigerant type cooling device of the present invention is heat dissipating by the cooling fin (326).

  The air refrigerant type cooling device of the present invention includes a motor casing (321, 421), main shafts (324, 424) inserted into the motor casing, and stored in the motor casing for rotationally driving the main shaft. A motor (320, 420) including a stator coil (325, 327, 425, 427) and a heat radiating means for radiating heat stored in the motor casing and accumulated in the stator coil; and a first motor To generate a pressure difference between the compressor (310, 410) connected in the axial direction of the motor, the expansion turbine (330, 430) connected in the second axial direction of the motor, and the outside of the motor. Means.

  The air refrigerant cooling system of the present invention includes an air refrigerant cooling device (300, 400), a first heat exchanger (120), a second heat exchanger (130), a refrigerator (140), A filter (150) and a fan (160), and the outlets (310a, 410a) of the compressor of the air refrigerant cooling device (300, 400) and the inlet of the first heat exchanger are connected, and the first heat exchanger The outlet of the second heat exchanger and the inlet of the second heat exchanger are connected, and the outlet of the second heat exchanger and the inlet (330a, 430a) of the expansion turbine of the air refrigerant type cooling device are connected to expand the air refrigerant type cooling device. The outlet of the turbine and the inlet of the refrigerator (140) are connected, and the outlet of the refrigerator is connected to the inlet of the compressor of the air refrigerant type cooling device via the second heat exchanger (130). Inside the motor of the cooling device For cooling, the fan (160) is connected to the first intake holes (321a, 421a) provided in the motor casing (321, 421) via the filter (150), and is provided in the motor casing (321, 421). Heat generated inside the motor is discharged from the second intake holes (321b, 421b).

  The air refrigerant cooling system of the present invention includes an air refrigerant cooling device (300, 400), a first heat exchanger (520), a second heat exchanger (530), and a refrigerator (540). And the outlet of the compressor of the air refrigerant cooling device (300, 400) and the inlet of the first heat exchanger (520) are connected, and the outlet of the first heat exchanger and the inlet of the second heat exchanger (530) And the outlet of the second heat exchanger and the inlet of the expansion turbine of the air refrigerant cooling device are connected, and the outlet of the expansion turbine of the air refrigerant cooling device and the inlet of the refrigerator (540) are connected. The outlet of the refrigerator is connected to the inlet of the compressor of the air refrigerant type cooling device via the second heat exchanger (530), and further the air refrigerant type cooling device for cooling the motor inside the air refrigerant type cooling device. Connected to the outlet of the expansion turbine The branched pipe is branched and connected to the first intake hole provided in the motor casing of the air refrigerant type cooling device, and the second intake air provided in the motor casing of the air refrigerant type cooling device. A hole and the inlet of the compressor of an air refrigerant type cooling device are connected.

  Moreover, the air refrigerant cooling system of the present invention includes an air refrigerant cooling device (300, 400), a first heat exchanger (620), a second heat exchanger (630), a refrigerator (640), A radiator (650), and the outlets (310a, 410a) of the compressor of the air refrigerant type cooling device (300, 400) and the inlet of the first heat exchanger (620) are connected, and the outlet of the first heat exchanger And the inlet of the second heat exchanger (630) are connected, the outlet of the second heat exchanger and the inlet (330a, 430a) of the expansion turbine of the air refrigerant cooling device are connected, and the air refrigerant cooling device The outlet of the expansion turbine and the inlet of the refrigerator (640) are connected, and the outlet of the refrigerator (640) is the inlet of the compressor of the air refrigerant type cooling device (300, 400) via the second heat exchanger (630). Connected to the sky In order to cool the inside of the motor of the refrigerant type cooling device (300, 400), a radiator (650) is arranged outside the air refrigerant type cooling device, and an inlet and an outlet of the radiator are arranged in the motor casing (321, 421). Are connected to intake holes (321a, 321b, 421a, 421b) corresponding to the respective inlets and outlets of the radiator.

  The air refrigerant cooling system of the present invention includes an air refrigerant cooling device (300, 400), a first heat exchanger (720), a second heat exchanger (730), and a refrigerator (740). The compressor outlets (310a, 410a) of the air refrigerant cooling device (300, 400) and the inlet of the first heat exchanger are connected, the outlet of the first heat exchanger and the inlet of the second heat exchanger, Are connected, and the outlet of the second heat exchanger and the inlet (330a, 430a) of the expansion turbine of the air refrigerant type cooling device are connected, and the outlet of the expansion turbine of the air refrigerant type cooling device and the inlet of the refrigerator (740) And the outlet of the refrigerator (740) is connected to the inlet of the (300, 400) compressor of the air refrigerant type cooling device via the second heat exchanger, and further inside the motor of the air refrigerant type cooling device. Second cooling heat exchange for cooling The pipe connected to the outlet of the vessel is branched, and the branched pipe is connected to the first intake holes (321a, 421a) provided in the motor casing (321, 421) of the air refrigerant type cooling device. The second intake holes (321b, 421b) disposed in the motor casings (321, 421) of the air refrigerant type cooling device (300, 400) and the inlet of the compressor of the air refrigerant type cooling device are connected. .

  The reflex container of the present invention includes an air refrigerant cooling device (210, 310), a first heat exchanger (820), a second heat exchanger (830), a container box (840), a radiator ( 850), the outlets (221c, 321c) of the compressor of the air refrigerant type cooling device (210, 310) and the inlet of the first heat exchanger are connected, and the outlet of the first heat exchanger and the second heat exchange The outlet of the second heat exchanger and the inlet (231a, 331a) of the expansion turbine of the air refrigerant cooling device are connected, and the outlet of the expansion turbine of the air refrigerant cooling device and the container box ( 840), the outlet of the container box (840) is connected to the inlet of the compressor of the air refrigerant type cooling device (210, 310) via the second heat exchanger, and further the air refrigerant type A radiator (850) is disposed outside the air-refrigerant cooling device for cooling the motor inside the rejection device (210, 310), and an inlet and an outlet of the radiator are disposed in the motor casing (241, 341). It is connected to intake holes (270a, 370a, 270b, 370b) corresponding to the respective inlets and outlets of the radiator, and further, an air-cooled refrigeration apparatus (210, 310), a first heat exchanger (820), The two heat exchanger (830), the container box (840), and the radiator (850) are configured to be portable as a reflex container (800).

  According to the present invention, it is possible to provide a highly reliable air refrigerant type cooling apparatus having an efficient motor internal air cooling mechanism. Further, by using the air refrigerant type cooling device, the configuration is simplified and a highly reliable air refrigerant cooling / heating system can be provided.

  BEST MODE FOR CARRYING OUT THE INVENTION Referring to the accompanying drawings, the best mode for carrying out an air refrigerant cooling device having a motor internal air cooling mechanism and an air refrigerant cooling system using the air refrigerant cooling device having a motor internal air cooling mechanism according to the present invention will be described. Is described below.

  First, for the purpose of giving an overview of the overall configuration of the present invention, an air refrigerant cooling system provided with a motor internal air cooling mechanism and an air refrigerant cooling system using the air refrigerant cooling apparatus provided with a motor internal air cooling mechanism will be described. FIG. 2 shows an air refrigerant cooling / heating system 100 according to Embodiment 3 of the present invention. The air refrigerant cooling system 100 according to the present invention includes air refrigerant cooling devices 300 and 400, a first heat exchanger 120, a second heat exchanger 130, and a cooler 140. Air refrigerant type cooling devices 300 and 400 include a compressor, a motor, and an expansion turbine.

  In the air refrigerant cooling system 100 according to the present invention, the air compressed by the compressors of the air refrigerant cooling devices 300 and 400 is cooled by the first heat exchanger 120. The cooled air is further heat-exchanged with the air from the cooler 140 in the second heat exchanger 130, and is adiabatically expanded by the expansion turbines of the air refrigerant type cooling devices 300 and 400 to a low temperature (−80 ° C.). The temperature is lowered. And the product preserve | saved in the refrigerator 140 is maintained at low temperature by sending this low temperature air directly into the refrigerator 140. FIG. The detailed operation principle of the air refrigerant cooling / heating system 100 will be described again in the third embodiment.

(Embodiment 1)
In FIG. 3, the cross section of schematic structure of the air refrigerant type cooling device 300 concerning Embodiment 1 of this invention is shown. The air refrigerant type cooling apparatus 300 according to the present embodiment includes a motor 320, a compressor 310, and an expansion turbine 330. The compressor 310 is connected to one end of the motor 320 in the axial direction. The expansion turbine 330 is connected to the other end of the motor 320 opposite to the compressor 310 in the axial direction. The motor 320 is located in the center of the compressor 310 and the expansion turbine 330 and has a main shaft 324 that is a rotation driving unit inserted in the motor casing 321, a stator coil main body 325 that drives the main shaft 324, and a shaft that sandwiches the stator coil main body 325. A stator coil end portion 327 located in the direction is provided.

  Next, the operation principle of the air refrigerant type cooling device 300 of the present embodiment will be described.

  The air-refrigerant cooling device 300 of the present embodiment is intended to increase efficiency by rotating at high speed, and high reliability is required during actual operation.

  First, a rotational driving force for the main shaft 324 is generated by an electromagnetic force between the main shaft 324 inserted in the motor casing 321 of the motor 320, the stator coil body 325, and the stator coil end portion 327. With this rotational driving force, the main shaft 324 of the motor 320 rotates relative to the stator coil body 325 and the stator coil end portion 327. During actual operation of the motor 320, heat is generated inside the motor 320 by the rotation of the main shaft 324. In the conventional motor, most of the heat generated in the motor is generated from the stator coil body 325. However, when the motor is rotated at a high speed and the motor is controlled using a general-purpose inverter board, it is necessary to reduce the number of poles of the motor and lower the inverter frequency. Moreover, in order to reduce motor iron loss, it is necessary to lower the inverter frequency.

  When the number of poles of the motor is reduced, the ratio of the length of the stator coil end portion 327 to the length of the stator coil main body 325 increases on the structure of the motor. When the ratio of the lengths of the stator coil end portions 327 increases, the amount of heat generated from the stator coil end portions 327 increases when the motor 320 is driven.

  In the present embodiment, in particular, for the purpose of efficiently exhausting the heat generated in the stator coil end portion 327 to the outside of the motor 320, the motor casing 321 is provided with a cooling air inlet 321a and a cooling air outlet 321b. Yes. The cooling air inlet 321a and the cooling air outlet 321b are disposed in the vicinity of the stator coil end portion 327 and the cooling fin 326, respectively. During actual operation of the motor 320, cooling air (130 mmAq, 40 ° C.) is sent into the motor casing 321 from the cooling air inlet 321 a through the filter 340 from the fan 350 installed outside the air refrigerant cooling device 300. Cooling air that has been introduced into the motor casing 321 and has cooled the main shaft 324, the stator coil body 325, and the stator coil end portion 327, which are motor driving units, is discharged from the cooling air discharge port 321b to the outside of the motor casing 321.

  In the air refrigerant type cooling device 300 of the present embodiment, cooling fins 326 are arranged between the stator coil body 325 and the motor casing. Heat generated from the stator coil main body 325 via the cooling fins 326 is cooled by cooling air sent into the motor 320 from the cooling air suction port 321a, and is discharged outside the motor casing 321 through the cooling air discharge port 321b. The

In the present embodiment, for the purpose of exhausting the heat generated from the stator coil end portion 327 and the cooling fin 326 stored in the motor casing 321 of the motor 320 to the outside of the motor casing 321, A pressure difference is generated between the outside. In the present embodiment, in order to generate the pressure difference, a positive pressure is applied by connecting a fan 350 installed outside the motor 320 to a cooling air inlet 321a disposed in the motor casing 321. but if the positive pressure exerted by the fan or the like, high and low temperature coolant air coming flow into the bearing near the main shaft is cut off through the labyrinth portion. Thereby, there is an advantage that the life of the parts inside the motor is extended and the reliability of the entire motor is improved.

In addition, cooling fins 326 are disposed between the stator coil body 325 and the motor casing for the purpose of efficiently exhausting heat from the motor. Further, the cooling air intake port 321a and the cooling air discharge port 321b are disposed in the vicinity of the stator coil end portion 327 and the cooling fin 326 of the motor casing 321, respectively. Thereby, the high temperature by the internal heat generation of the motor 320 is prevented, and stable high-speed rotation is maintained. As a result, despite the high-speed rotation, the component life of the main shaft and the stator is extended, and the reliability as a motor is improved. Therefore, the highly efficient and reliable air refrigerant cooling device 210 can be realized.
The air refrigerant type cooling device according to the present invention can be applied to refrigeration, refrigeration, and air conditioning cooling by changing the temperature and pressure level of the system, and thus includes a refrigeration device, a refrigeration device, and an air conditioning cooling device. Although only the case of refrigeration has been described in the present embodiment, the present invention can be similarly applied to the case of refrigeration and air conditioning cooling by changing the temperature / pressure level of the system.

(Embodiment 2)
In FIG. 4, the cross section of schematic structure of the air refrigerant type cooling device 400 concerning Embodiment 2 of this invention is shown. The basic configuration of the air refrigerant type cooling device 400 of the present embodiment is the same as that of the air refrigerant type cooling device 300 of the first embodiment. Further, as in the first embodiment, the motor 420, which is a constituent requirement, rotates at a high speed so that the efficiency of the entire apparatus is increased, and high reliability is required during actual operation. In the present embodiment, there is further provided a guide plate (guide plate) 460 that is disposed in the motor casing 421 and controls the cooling air taken from the cooling air intake port 421a to flow into the stator coil end portion 427. ing.

  The air refrigerant type cooling apparatus 400 of the present embodiment includes a motor 420, a compressor 410, and an expansion turbine 430. The compressor 410 is connected to one end of the motor 420 in the axial direction. The expansion turbine 430 is connected to the other end of the motor 420 opposite to the compressor 410 in the axial direction. The motor 420 is located in the center of the compressor 410 and the expansion turbine 430, and includes a main shaft 424 that is a rotational drive unit inserted into the motor casing 421, and a stator that drives the main shaft 424. The stator includes a stator coil body 425 and a stator coil end portion 427 that is positioned symmetrically in the axial direction with the stator coil body 425 interposed therebetween.

  The principle of operation of the air refrigerant type cooling device 400 of the present embodiment is basically the same as that described in the air refrigerant type cooling device 300 of the first embodiment, and is omitted here. However, in the present embodiment, a guide plate (guide plate) 460 for rectifying the cooling air taken from the cooling air suction port 421a so as to flow into the stator coil end portion 427 is disposed on the inner wall of the motor casing 421. ing. Thereby, compared with Embodiment 1, the flow volume of the cooling air which hits the stator coil end part 427 increases, and the heat generated from the stator coil end part 427 is efficiently disposed in the motor casing 421 by the cooling air. It is discharged to the outside of the motor 420 through the cooling air discharge port 421b.

  In the present embodiment, in order to generate the cooling air, a fan 450 installed outside the motor 420 is connected to the cooling air suction port 421a disposed in the motor casing 421 to apply a positive pressure. However, negative pressure may be applied by connecting to a compressor or the like. Further, for the purpose of efficiently exhausting heat from the stator coil body 425, cooling fins 426 are disposed between the stator coil body 425 and the motor casing. A cooling air inlet 421a and a cooling air outlet 421b, which are cooling air passages between the inside and outside of the motor casing 421, are disposed in the vicinity of the stator coil end portion 427 and the cooling fins 426 of the motor casing 421, respectively. Further, in the present embodiment, in the vicinity of the cooling air inlet 421a on the inner wall of the motor casing 421 so that the cooling air sent from the cooling air inlet 421a into the motor casing 421 efficiently hits the stator coil end portion 427. A guide plate (guide plate) 460 is disposed at the top.

  Thereby, the high temperature by the internal heat generation of the motor 420 is prevented, and stable high-speed rotation is maintained. And the highly efficient and reliable air refrigerant cooling device 400 provided with the motor 420 can be realized.

(Embodiment 3)
FIG. 2 shows a schematic diagram of an air refrigerant cooling / heating system 100 according to the third embodiment.

  The air refrigerant cooling system 100 according to the present embodiment includes the air refrigerant cooling devices 300 and 400, the first heat exchanger 120, the second heat exchanger 130, the cooler 140, the filter 150, and the first embodiment or the second embodiment. A fan 160 is provided.

  The refrigerant in the present embodiment is air, and the concern about environmental destruction caused by the ozone refrigerant that has been conventionally used is eliminated.

  In the present embodiment, the inlet of first heat exchanger 120 is connected to the outlets of the compressors of air refrigerant cooling devices 300 and 400 by piping. The inlet of the second heat exchanger 130 is connected to the outlet of the first heat exchanger 120 by piping. The outlet of the second heat exchanger 130 is connected to the inlet of the expansion turbine of the air refrigerant cooling devices 300 and 400 by piping. The outlets of the expansion turbines of the air refrigerant cooling devices 300 and 400 are connected to the refrigerant air inlet of the cooler 140 by piping. The air refrigerant outlet of the cooler 140 is connected to the compressor inlets of the air refrigerant cooling devices 300 and 400 via the second heat exchanger 130 by piping. Further, a fan 160 is connected via a filter 150 to an air intake hole provided in the motor casing for cooling the inside of the motor of the air refrigerant cooling devices 300 and 400.

Next, the operation principle of the air refrigerant cooling / heating system 100 according to the present embodiment will be described. The air refrigerant cooling / heating system 100 according to the present embodiment is a circulation type system using air as a refrigerant, and the refrigerant air is directly fed into the inside of the cooling chamber 140 by incorporating the inside of the cooling chamber 140 into the circulation loop. Here, the refrigerator includes a freezer, a refrigerator, and the like.
The refrigerator 140 is, for example, a semi-hermetic type in addition to storing the product at a low temperature, and the food is passed through the space cooled by the air-refrigerant cooling devices 300 and 400 by a belt conveyor, so that the frozen food is used. It is also possible to apply the present invention to certain examples. Furthermore, it can be used for a pharmaceutical reaction apparatus that is frozen in the manufacturing process of the pharmaceutical.

  First, the refrigerant air at 35 ° C. (pressure: −173 mmAq) sent to the compressor inlets of the air refrigerant cooling devices 300 and 400 is compressed by the compressor and discharged from the compressor outlet as 119 ° C. air refrigerant. The discharged air refrigerant at 119 ° C. is sent to the first heat exchanger 120 and is cooled to 43 ° C. by the first heat exchanger 120. Further, the air refrigerant cooled to 43 ° C. is sent to the second heat exchanger 130 for heat exchange, and is cooled to around −47 ° C. The air refrigerant cooled to −47 ° C. is sent to the inlets of the expansion turbines of the air refrigerant cooling devices 300 and 400, where it is adiabatically expanded and cooled to −80 ° C. The refrigerant air cooled to −80 ° C. is sent to the cooler 140 to cool the product stored in the cooler 140 directly. In the present embodiment, the temperature in the refrigerator 140 is maintained at around −55 ° C. The −55 ° C. refrigerant air discharged from the cooler 140 is sent to the second heat exchanger 130, and heat exchange is performed with the air refrigerant sent from the first heat exchanger 120, whereby the first heat exchange is performed. The air refrigerant sent from the vessel 120 is cooled to -47 ° C. Then, the refrigerant air from the cooler 140 that has exchanged heat with the second heat exchanger 130 and raised the temperature to 35 ° C. is sent to the compressor inlets of the air refrigerant type cooling devices 300 and 400 again, thereby circulating the refrigerant air. The system is established. Further, cooling air for cooling the inside of the motor from the fan 160 through the filter 150 is sent into the motor through the cooling hole of the motor casing. And after cooling the inside of a motor, cooling air is open | released by the air through the cooling hole of a motor casing from the inside of a motor.

  In this embodiment, by using air as the refrigerant, there is no concern about environmental pollution compared to conventional refrigerants such as Freon. Further, by using the air refrigerant type cooling devices 300 and 400 shown in the first or second embodiment, it is possible to cool the inside of the refrigerator 140 to a desired temperature with only a minimum heat exchanger. An efficient and reliable air refrigerant cooling / heating system 100 can be provided.

  In addition, since the configuration is essentially simple in the present embodiment, the overall equipment cost is reduced, and low-temperature refrigerant air is directly fed into the cooler 140, so that the unit cooler and the refrigerant piping in the warehouse are used. Is no longer necessary. For this reason, the construction cost can be significantly reduced.

(Embodiment 4)
FIG. 5 shows a schematic diagram of an air refrigerant cooling / heating system 500 according to the fourth embodiment.

  The basic configuration of air refrigerant cooling system 500 of the present embodiment is the same as that of air refrigerant cooling system 100 in the third embodiment. However, there is a difference in the configuration for cooling the motor of the air-refrigerant cooling devices 300 and 400, which is a component requirement.

  The air refrigerant cooling system 500 according to the present embodiment includes the air refrigerant cooling devices 300 and 400, the first heat exchanger 520, the second heat exchanger 530, and the refrigerator 540 according to the first or second embodiment. Yes.

  The configuration and operation principle of the present embodiment are the same as those of the air refrigerant cooling / heating system 100 in the third embodiment, and thus the description thereof is omitted here.

  In the present embodiment, the pipe connected to the outlet of the expansion turbine of the air refrigerant type cooling devices 300 and 400 is branched, one being arranged at the inlet of the cooler 540 and the other being arranged at the motor casing. Connected to the air intake hole. In addition, an air intake hole provided in the motor casing of the air refrigerant type cooling devices 300 and 400 and a compressor inlet of the air refrigerant type cooling devices 300 and 400 are connected by a pipe.

  Thus, during the driving of the air refrigerant cooling system 500, a part of the 80 ° C. refrigerant air that is always discharged from the outlet of the expansion turbine of the air refrigerant cooling device 300, 400 is stored in the air refrigerant cooling device 300, 400. It is sent to the inside of the motor to cool the inside of the motor. Further, the cooled refrigerant air is discharged from the motor at about 40 ° C., and is sent again to the compressor inlets of the air refrigerant type cooling devices 300 and 400. Thereby, in this Embodiment, refrigerant | coolant air cools the inside of the motor of the air refrigerant | coolant type cooling device 300,400 simultaneously with maintaining the temperature in the refrigerator 540 at low temperature.

  In the present embodiment, the same effects as those of the third embodiment are provided, and the internal cooling of the motors of the air refrigerant cooling devices 300 and 400 can be efficiently performed using the circulating refrigerant air. Thereby, the air refrigerant cooling / heating system 500 with high reliability can be provided at a lower equipment cost than the air refrigerant cooling / heating systems 300 and 400 of the third embodiment.

(Embodiment 5)
FIG. 6 shows a schematic diagram of an air refrigerant cooling / heating system 600 according to the fifth embodiment.

  The basic configuration of the air refrigerant cooling system 600 according to the present embodiment is the same as that of the air refrigerant cooling systems 100 and 500 according to the third and fourth embodiments. However, there is a difference in the configuration for cooling the motor of the air-refrigerant cooling devices 300 and 400, which is a component requirement.

  The air refrigerant cooling system 600 according to the present embodiment includes the air refrigerant cooling devices 300 and 400, the first heat exchanger 620, the second heat exchanger 630, the cooler 640, and the air refrigerant of the first or second embodiment. A radiator 650 for cooling the motors of the type cooling devices 300 and 400 is provided.

  Since the configuration and operation principle of the present embodiment are the same as those of the air refrigerant cooling / heating systems 100 and 500 in the third and fourth embodiments, the description thereof is omitted here.

  In the present embodiment, a radiator 650 is disposed outside the air refrigerant cooling devices 300 and 400. An inlet and an outlet of the radiator 650 are connected to intake holes corresponding to the inlet and the outlet arranged in the motor casing.

  While the air refrigerant cooling system 600 is being driven, the radiator 650 is simultaneously driven to circulate the air inside the motors of the air refrigerant cooling devices 300 and 400. The radiator 650 cools the 40 ° C. cooling air discharged from the motor to 30 ° C.

  In the present embodiment, the effects similar to those of the third and fourth embodiments are provided, and the cooling efficiency of the motors of the air refrigerant type cooling devices 300 and 400 is increased by driving the radiator 650. The air refrigerant cooling / heating system 600 having higher reliability than the four air refrigerant cooling / heating systems 100 and 500 can be provided.

(Embodiment 6)
FIG. 7 shows a schematic diagram of an air refrigerant cooling / heating system 700 according to the sixth embodiment.

  The basic configuration of the air refrigerant cooling system 700 of the present embodiment is the same as that of the air refrigerant cooling systems 100, 500, and 600 in the third to fifth embodiments. However, there is a difference in the configuration for cooling the motor of the air-refrigerant cooling devices 300 and 400, which is a component requirement.

  The air refrigerant cooling system 700 according to the present embodiment includes the air refrigerant cooling devices 300 and 400, the first heat exchanger 720, the second heat exchanger 730, and the cooler 740 according to the first or second embodiment. Yes.

  Since the configuration and operation principle of the present embodiment are the same as those of the air refrigerant cooling / heating systems 100, 500, and 600 in the third to fifth embodiments, the description thereof is omitted here.

  In the present embodiment, the pipe connected to the outlet of the second cooling heat exchanger 730 is branched, one is arranged at the inlet of the expansion turbine of the air refrigerant type cooling devices 300 and 400, and the other is arranged at the motor casing. Is connected to the intake hole. In addition, an air intake hole provided in the motor casing of the air refrigerant type cooling devices 300 and 400 and a compressor inlet of the air refrigerant type cooling devices 300 and 400 are connected by a pipe.

  As a result, during the operation of the air refrigerant cooling system 700, a part of the −47 ° C. refrigerant air discharged from the outlet of the second cooling heat exchanger 730 is always sent into the motors of the air refrigerant cooling devices 300 and 400. Then, the inside of the motor is cooled. Further, the cooled refrigerant air is discharged from the motor at about 40 ° C., and is sent again to the compressor inlets of the air refrigerant type cooling devices 300 and 400. Thereby, in this Embodiment, refrigerant | coolant air cools the inside of the motor of the air refrigerant | coolant type cooling device 300,400 simultaneously with maintaining the temperature in the refrigerator 740 at low temperature.

  In the present embodiment, the same effects as those of the fourth and sixth embodiments are provided, and the internal cooling of the motors of the air refrigerant cooling devices 300 and 400 can be efficiently performed using the circulating refrigerant air. . Thereby, it is possible to provide a highly reliable air refrigerant cooling / heating system 700 at a lower cost compared to the air refrigerant cooling / heating systems 100 and 600 of the third and fifth embodiments.

(Embodiment 7)
FIG. 8 shows a schematic diagram of a reflex container 800 according to the seventh embodiment.

  The basic configuration of the reflex container 800 of the present embodiment is the same as that of the air refrigerant cooling / heating system 600 in the fifth embodiment. However, the entire system is configured to be portable.

  The reflex container 800 according to the present embodiment includes the air refrigerant cooling device 300, 400 of the first or second embodiment, the first heat exchanger 820, the second heat exchanger 830, the container box 840, and the air refrigerant cooling device. A radiator 850 is provided for cooling the 300 and 400 motors.

  Since the configuration and operation principle of the present embodiment are the same as those of the air refrigerant cooling / heating systems 100 and 600 in the third and fifth embodiments, the description thereof is omitted here.

  In the present embodiment, radiator 850 is arranged outside air refrigerant cooling devices 300 and 400. An inlet and an outlet of the radiator 850 are connected to intake holes corresponding to the inlet and the outlet arranged in the motor casing. While the reflex container 800 is being driven, the radiator 850 is simultaneously driven to circulate the air inside the motors of the air refrigerant cooling devices 300 and 400. The radiator 850 cools the 40 ° C. cooling air discharged from the motor to 30 ° C.

  Further, in the present embodiment, the air refrigerant type cooling devices 300 and 400, which are constituent requirements, the first heat exchanger 820, the second heat exchanger 830, the container box 840, and the radiator 850 are all configured as a portable type. The entire system can be loaded on a car, a ship, a railroad, etc., and the product can be transported in the container box 840 while being stored frozen.

  In the present embodiment, by making the entire system portable, it is possible to provide a highly reliable air refrigerant cooling / heating system for refrigeration and transportation where demand is expected to increase in the future. Although only the case of refrigeration has been described in the present embodiment, the present invention can also be applied to the case of refrigeration and air conditioning cooling by changing the temperature and pressure level of the system as in the other examples.

It is sectional drawing which shows schematic structure of the conventional air cooling motor. 6 is an air refrigerant cooling / heating system according to Embodiment 3. 1 is a cross-sectional view showing a schematic configuration of an air refrigerant cooling / heating device according to Embodiment 1. FIG. 6 is a cross-sectional view showing a schematic configuration of an air refrigerant cooling / heating device according to Embodiment 2. FIG. 7 is an air refrigerant cooling / heating system according to Embodiment 4. 6 is an air refrigerant cooling / heating system according to a fifth embodiment. 7 is an air refrigerant cooling / heating system according to a sixth embodiment. 10 is a reflex container according to the seventh embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Air cooling motor 2 ... Air cooling fan 3, 327, 427 ... Stator coil end part 4, 325, 425 ... Stator coil main body 5 ... External fin 6 ... Stator casing 7, 324, 424 ... Main shaft 8 ... Stator main body 100, 500, 600, 700 ... air refrigerant cooling / heating system 120, 520, 620, 720, 820 ... first heat exchanger 130, 530, 630, 730, 830 ... second heat exchanger 140, 540, 640, 740 ... refrigerator 150, 340, 440 ... Filters 160, 350, 450 ... Fans 300, 400 ... Air refrigerant cooling devices 310, 410 ... Compressors 310a, 410a ... Compressor discharge ports 321a, 321b, 421a, 421b ... Intake holes 320, 420 ... Motors 321, 421 ... Motor casing 326, 426 ... Cooling fin 30,430 ... expansion turbine 330a, 430a ... expansion turbine inlet 460 ... guide plate (guide plate)
650, 850 ... Radiator 800 ... Ref container 840 ... Container box

Claims (4)

A motor casing, a main shaft inserted into the motor casing, a stator coil stored in the motor casing for rotationally driving the main shaft, and stored in the motor casing and stored in the stator coil A motor having a heat dissipation means for radiating heat;
A compressor connected in a first axial direction of the motor;
An expansion turbine connected in a second axial direction of the motor;
Means for creating a pressure difference between the interior and exterior of the motor;
A first heat exchanger;
With the second heat exchanger
Comprising
The outlet of the compressor and the inlet of the first heat exchanger of the air refrigerant cooling device are connected, the outlet of the first heat exchanger and the inlet of the second heat exchanger are connected, and the second An outlet of the heat exchanger and an inlet of the expansion turbine of the air refrigerant cooling device are connected, an outlet of the expansion turbine of the air refrigerant cooling device and an inlet of the refrigerator are connected, and an outlet of the cooling chamber Is connected to the inlet of the compressor of the air refrigerant cooling device via the second heat exchanger,
Further, a pipe connected to the outlet of the expansion turbine of the air refrigerant type cooling device is branched for cooling the motor inside the air refrigerant type cooling device, and the branched pipe is the air refrigerant type cooling device. Connected to an inlet provided in the motor casing of the apparatus, and connected to an outlet provided in the motor casing of the air refrigerant type cooling device and an inlet of the compressor of the air refrigerant type cooling device air refrigerant cold systems.   A motor casing, a main shaft inserted into the motor casing, a stator coil stored in the motor casing for rotationally driving the main shaft, and stored in the motor casing and stored in the stator coil A motor having a heat dissipation means for radiating heat;
  A compressor connected in a first axial direction of the motor;
  An expansion turbine connected in a second axial direction of the motor;
  Means for creating a pressure difference between the interior and exterior of the motor;
  A first heat exchanger;
  With the second heat exchanger
Comprising
  The outlet of the compressor and the inlet of the first heat exchanger of the air refrigerant cooling device are connected, the outlet of the first heat exchanger and the inlet of the second heat exchanger are connected, and the second An outlet of the heat exchanger and an inlet of the expansion turbine of the air refrigerant cooling device are connected, an outlet of the expansion turbine of the air refrigerant cooling device and an inlet of the refrigerator are connected, and an outlet of the cooling chamber Is connected to the inlet of the compressor of the air refrigerant cooling device via the second heat exchanger,
  Further, a pipe connected to the outlet of the second cooling heat exchanger is branched for cooling the motor inside the air refrigerant type cooling device, and the branched pipe is the same as the air refrigerant type cooling device. Air connected to a suction port provided in the motor casing, and connected to a discharge port provided in the motor casing of the air refrigerant type cooling device and an inlet of the compressor of the air refrigerant type cooling device. Refrigerant cooling / heating system.   A motor casing, a main shaft inserted into the motor casing, a stator coil stored in the motor casing for rotationally driving the main shaft, and stored in the motor casing and stored in the stator coil A motor having a heat dissipation means for radiating heat;
  A compressor connected in a first axial direction of the motor;
  An expansion turbine connected in a second axial direction of the motor;
Comprising
  The stator coil includes a stator coil body and a stator coil end portion positioned symmetrically in the axial direction across the stator coil body, and the heat dissipation means is disposed between the stator coil body and the motor casing.
  The motor casing is provided with a suction port, a discharge port, and guide means connected in the vicinity of the suction port,
  Cooling air is sucked from the suction port and flows directly to one side of the stator coil end portion that is positioned symmetrically in the axial direction with the stator coil main body in the motor casing interposed between the guide means, One side of the stator coil end portion and the other side of the stator coil end portion located symmetrically in the axial direction from the discharge port through the heat radiating means and sandwiching the heat radiating means and the stator coil body An air refrigerant type cooling device that is discharged from the discharge port via   In the air-cooling type cooling device according to at least one of claims 1 to 3,
  An air refrigerant type cooling device in which cooling air from the outside is sucked from the suction port by applying positive pressure from the outside to the suction port disposed in the motor casing.

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